Immediate memberane covering the mammalian egg is

Options

A. Corona radiata
B. Zona pellucida
C. Vitelline membrane
D. Chorion.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the immediate membrane covering the mammalian egg. We need to identify the correct term from the provided options.

2. **Analyzing the Options:**
- **A. Corona Radiata:** This is a layer of cells that surround the egg after ovulation but is not the immediate membrane covering the egg itself.
- **B. Zona Pellucida:** This is a glycoprotein layer surrounding the plasma membrane of the egg, but it is not the immediate membrane.
- **C. Vital Membrane:** This term refers to the plasma membrane of the ovum, which is indeed the immediate covering of the egg.
- **D. Chorion:** This is a membrane that forms part of the placenta, not directly related to the egg itself.

3. **Identifying the Correct Answer:** The immediate membrane covering the mammalian egg is the **Vital Membrane** (also known as the plasma membrane of the ovum).

4. **Conclusion:** Therefore, the correct answer to the question is **Option C: Vital Membrane**.

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